/**
 * @1900-2100区间内的公历、农历互转
 * @charset UTF-8
 * @Author  Jea杨(JJonline@JJonline.Cn)
 * @Time    2014-7-21
 * @Time    2016-8-13 Fixed 2033hex、Attribution Annals
 * @Time    2016-9-25 Fixed lunar LeapMonth Param Bug
 * @Time    2017-7-24 Fixed use getTerm Func Param Error.use solar year,NOT lunar year
 * @Version 1.0.3
 * @公历转农历：calendar.solar2lunar(1987,11,01); //[you can ignore params of prefix 0]
 * @农历转公历：calendar.lunar2solar(1987,09,10); //[you can ignore params of prefix 0]
 */

type Festival = {
  [props: string]: {
    title: string
  }
}

type SolarData = {
  date: string
  lunarDate: string
  festival: string | null
  lunarFestival: string | null
  lYear: number
  lMonth: number
  lDay: number
  Animal: string
  IMonthCn: string
  IDayCn: string
  cYear: number
  cMonth: number
  cDay: number
  gzYear: string
  gzMonth: string
  gzDay: string
  isToday: boolean
  isLeap: boolean
  nWeek: number
  ncWeek: string
  isTerm: boolean
  Term: string | null
  astro: string
}

/**
 * 农历1900-2100的润大小信息表
 * @Array Of Property
 * @return Hex
 */
const lunarInfo: number[] = [
  0x04bd8,
  0x04ae0,
  0x0a570,
  0x054d5,
  0x0d260,
  0x0d950,
  0x16554,
  0x056a0,
  0x09ad0,
  0x055d2, //1900-1909
  0x04ae0,
  0x0a5b6,
  0x0a4d0,
  0x0d250,
  0x1d255,
  0x0b540,
  0x0d6a0,
  0x0ada2,
  0x095b0,
  0x14977, //1910-1919
  0x04970,
  0x0a4b0,
  0x0b4b5,
  0x06a50,
  0x06d40,
  0x1ab54,
  0x02b60,
  0x09570,
  0x052f2,
  0x04970, //1920-1929
  0x06566,
  0x0d4a0,
  0x0ea50,
  0x16a95,
  0x05ad0,
  0x02b60,
  0x186e3,
  0x092e0,
  0x1c8d7,
  0x0c950, //1930-1939
  0x0d4a0,
  0x1d8a6,
  0x0b550,
  0x056a0,
  0x1a5b4,
  0x025d0,
  0x092d0,
  0x0d2b2,
  0x0a950,
  0x0b557, //1940-1949
  0x06ca0,
  0x0b550,
  0x15355,
  0x04da0,
  0x0a5b0,
  0x14573,
  0x052b0,
  0x0a9a8,
  0x0e950,
  0x06aa0, //1950-1959
  0x0aea6,
  0x0ab50,
  0x04b60,
  0x0aae4,
  0x0a570,
  0x05260,
  0x0f263,
  0x0d950,
  0x05b57,
  0x056a0, //1960-1969
  0x096d0,
  0x04dd5,
  0x04ad0,
  0x0a4d0,
  0x0d4d4,
  0x0d250,
  0x0d558,
  0x0b540,
  0x0b6a0,
  0x195a6, //1970-1979
  0x095b0,
  0x049b0,
  0x0a974,
  0x0a4b0,
  0x0b27a,
  0x06a50,
  0x06d40,
  0x0af46,
  0x0ab60,
  0x09570, //1980-1989
  0x04af5,
  0x04970,
  0x064b0,
  0x074a3,
  0x0ea50,
  0x06b58,
  0x05ac0,
  0x0ab60,
  0x096d5,
  0x092e0, //1990-1999
  0x0c960,
  0x0d954,
  0x0d4a0,
  0x0da50,
  0x07552,
  0x056a0,
  0x0abb7,
  0x025d0,
  0x092d0,
  0x0cab5, //2000-2009
  0x0a950,
  0x0b4a0,
  0x0baa4,
  0x0ad50,
  0x055d9,
  0x04ba0,
  0x0a5b0,
  0x15176,
  0x052b0,
  0x0a930, //2010-2019
  0x07954,
  0x06aa0,
  0x0ad50,
  0x05b52,
  0x04b60,
  0x0a6e6,
  0x0a4e0,
  0x0d260,
  0x0ea65,
  0x0d530, //2020-2029
  0x05aa0,
  0x076a3,
  0x096d0,
  0x04afb,
  0x04ad0,
  0x0a4d0,
  0x1d0b6,
  0x0d250,
  0x0d520,
  0x0dd45, //2030-2039
  0x0b5a0,
  0x056d0,
  0x055b2,
  0x049b0,
  0x0a577,
  0x0a4b0,
  0x0aa50,
  0x1b255,
  0x06d20,
  0x0ada0, //2040-2049
  /**Add By JJonline@JJonline.Cn**/
  0x14b63,
  0x09370,
  0x049f8,
  0x04970,
  0x064b0,
  0x168a6,
  0x0ea50,
  0x06b20,
  0x1a6c4,
  0x0aae0, //2050-2059
  0x092e0,
  0x0d2e3,
  0x0c960,
  0x0d557,
  0x0d4a0,
  0x0da50,
  0x05d55,
  0x056a0,
  0x0a6d0,
  0x055d4, //2060-2069
  0x052d0,
  0x0a9b8,
  0x0a950,
  0x0b4a0,
  0x0b6a6,
  0x0ad50,
  0x055a0,
  0x0aba4,
  0x0a5b0,
  0x052b0, //2070-2079
  0x0b273,
  0x06930,
  0x07337,
  0x06aa0,
  0x0ad50,
  0x14b55,
  0x04b60,
  0x0a570,
  0x054e4,
  0x0d160, //2080-2089
  0x0e968,
  0x0d520,
  0x0daa0,
  0x16aa6,
  0x056d0,
  0x04ae0,
  0x0a9d4,
  0x0a2d0,
  0x0d150,
  0x0f252, //2090-2099
  0x0d520,
] //2100

/**
 * 公历每个月份的天数普通表
 * @Array Of Property
 * @return Number
 */
const solarMonth: number[] = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]

/**
 * 天干地支之天干速查表
 * @Array Of Property trans["甲","乙","丙","丁","戊","己","庚","辛","壬","癸"]
 * @return Cn string
 */
const Gan: string[] = [
  '\u7532',
  '\u4E59',
  '\u4E19',
  '\u4E01',
  '\u620A',
  '\u5DF1',
  '\u5E9A',
  '\u8F9B',
  '\u58EC',
  '\u7678',
]

/**
 * 天干地支之地支速查表
 * @Array Of Property
 * @trans["子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥"]
 * @return Cn string
 */
const Zhi: string[] = [
  '\u5B50',
  '\u4E11',
  '\u5BC5',
  '\u536F',
  '\u8FB0',
  '\u5DF3',
  '\u5348',
  '\u672A',
  '\u7533',
  '\u9149',
  '\u620C',
  '\u4EA5',
]

/**
 * 天干地支之地支速查表<=>生肖
 * @Array Of Property
 * @trans["鼠","牛","虎","兔","龙","蛇","马","羊","猴","鸡","狗","猪"]
 * @return Cn string
 */
const Animals: string[] = [
  '\u9F20',
  '\u725B',
  '\u864E',
  '\u5154',
  '\u9F99',
  '\u86C7',
  '\u9A6C',
  '\u7F8A',
  '\u7334',
  '\u9E21',
  '\u72D7',
  '\u732A',
]

/**
 * 阳历节日
 */
let festival: Festival = {
  '1-1': { title: '元旦节' },
  '2-14': { title: '情人节' },
  '5-1': { title: '劳动节' },
  '5-4': { title: '青年节' },
  '6-1': { title: '儿童节' },
  '9-10': { title: '教师节' },
  '10-1': { title: '国庆节' },
  '12-25': { title: '圣诞节' },

  '3-8': { title: '妇女节' },
  '3-12': { title: '植树节' },
  '4-1': { title: '愚人节' },
  '5-12': { title: '护士节' },
  '7-1': { title: '建党节' },
  '8-1': { title: '建军节' },
  '12-24': { title: '平安夜' },
}

/**
 * 农历节日
 */
let lFestival: Festival = {
  '12-30': { title: '除夕' },
  '1-1': { title: '春节' },
  '1-15': { title: '元宵节' },
  '2-2': { title: '龙抬头' },
  '5-5': { title: '端午节' },
  '7-7': { title: '七夕节' },
  '7-15': { title: '中元节' },
  '8-15': { title: '中秋节' },
  '9-9': { title: '重阳节' },
  '10-1': { title: '寒衣节' },
  '10-15': { title: '下元节' },
  '12-8': { title: '腊八节' },
  '12-23': { title: '北方小年' },
  '12-24': { title: '南方小年' },
}

/**
 * 24节气速查表
 * @Array Of Property
 * @trans["小寒","大寒","立春","雨水","惊蛰","春分","清明","谷雨","立夏","小满","芒种","夏至","小暑","大暑","立秋","处暑","白露","秋分","寒露","霜降","立冬","小雪","大雪","冬至"]
 * @return Cn string
 */
const solarTerm: string[] = [
  '\u5C0F\u5BD2',
  '\u5927\u5BD2',
  '\u7ACB\u6625',
  '\u96E8\u6C34',
  '\u60CA\u86F0',
  '\u6625\u5206',
  '\u6E05\u660E',
  '\u8C37\u96E8',
  '\u7ACB\u590F',
  '\u5C0F\u6EE1',
  '\u8292\u79CD',
  '\u590F\u81F3',
  '\u5C0F\u6691',
  '\u5927\u6691',
  '\u7ACB\u79CB',
  '\u5904\u6691',
  '\u767D\u9732',
  '\u79CB\u5206',
  '\u5BD2\u9732',
  '\u971C\u964D',
  '\u7ACB\u51AC',
  '\u5C0F\u96EA',
  '\u5927\u96EA',
  '\u51AC\u81F3',
]

/**
 * 1900-2100各年的24节气日期速查表
 * @Array Of Property
 * @return 0x string For splice
 */
const sTermInfo: string[] = [
  '9778397bd097c36b0b6fc9274c91aa',
  '97b6b97bd19801ec9210c965cc920e',
  '97bcf97c3598082c95f8c965cc920f',
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  'b027097bd097c36b0b6fc9274c91aa',
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  '97bd09801d98082c95f8e1cfcc920f',
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  '97bd09801d98082c95f8e1cfcc920f',
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  '7f0e27f1487f531b0b0bb0b6fb0722',
  '7f0e37f0e37f14898082b072297c35',
  '7ec967f0e37f14998082b0787b06bd',
  '7f07e7f0e47f531b0723b0b6fb0721',
  '7f0e27f1487f531b0b0bb0b6fb0722',
  '7f0e37f0e366aa89801eb072297c35',
  '7ec967f0e37f14998082b0787b06bd',
  '7f07e7f0e47f149b0723b0787b0721',
  '7f0e27f1487f531b0b0bb0b6fb0722',
  '7f0e37f0e366aa89801eb072297c35',
  '7ec967f0e37f14998082b0723b06bd',
  '7f07e7f0e47f149b0723b0787b0721',
  '7f0e27f0e47f531b0723b0b6fb0722',
  '7f0e37f0e366aa89801eb072297c35',
  '7ec967f0e37f14998082b0723b06bd',
  '7f07e7f0e37f14998083b0787b0721',
  '7f0e27f0e47f531b0723b0b6fb0722',
  '7f0e37f0e366aa89801eb072297c35',
  '7ec967f0e37f14898082b0723b02d5',
  '7f07e7f0e37f14998082b0787b0721',
  '7f07e7f0e47f531b0723b0b6fb0722',
  '7f0e36665b66aa89801e9808297c35',
  '665f67f0e37f14898082b0723b02d5',
  '7ec967f0e37f14998082b0787b0721',
  '7f07e7f0e47f531b0723b0b6fb0722',
  '7f0e36665b66a449801e9808297c35',
  '665f67f0e37f14898082b0723b02d5',
  '7ec967f0e37f14998082b0787b06bd',
  '7f07e7f0e47f531b0723b0b6fb0721',
  '7f0e36665b66a449801e9808297c35',
  '665f67f0e37f14898082b072297c35',
  '7ec967f0e37f14998082b0787b06bd',
  '7f07e7f0e47f531b0723b0b6fb0721',
  '7f0e26665b66a449801e9808297c35',
  '665f67f0e37f1489801eb072297c35',
  '7ec967f0e37f14998082b0787b06bd',
  '7f07e7f0e47f531b0723b0b6fb0721',
  '7f0e27f1487f531b0b0bb0b6fb0722',
]

/**
 * 数字转中文速查表
 * @Array Of Property
 * @trans ['日','一','二','三','四','五','六','七','八','九','十']
 * @return Cn string
 */
const nStr1: string[] = [
  '\u65E5',
  '\u4E00',
  '\u4E8C',
  '\u4E09',
  '\u56DB',
  '\u4E94',
  '\u516D',
  '\u4E03',
  '\u516B',
  '\u4E5D',
  '\u5341',
]

/**
 * 日期转农历称呼速查表
 * @Array Of Property
 * @trans ['初','十','廿','卅']
 * @return Cn string
 */
const nStr2: string[] = ['\u521D', '\u5341', '\u5EFF', '\u5345']

/**
 * 月份转农历称呼速查表
 * @Array Of Property
 * @trans ['正','一','二','三','四','五','六','七','八','九','十','冬','腊']
 * @return Cn string
 */
const nStr3: string[] = [
  '\u6B63',
  '\u4E8C',
  '\u4E09',
  '\u56DB',
  '\u4E94',
  '\u516D',
  '\u4E03',
  '\u516B',
  '\u4E5D',
  '\u5341',
  '\u51AC',
  '\u814A',
]

/**
 * 返回默认定义的阳历节日
 */
export const getFestival = (): Festival => {
  return festival
}

/**
 * 返回默认定义的内容里节日
 */
export const getLunarFestival = (): Festival => {
  return lFestival
}

/**
 *
 * @param param {Object} 按照festival的格式输入数据，设置阳历节日
 */
export const setFestival = (param: Festival = {}) => {
  festival = param
}

/**
 *
 * @param param {Object} 按照lFestival的格式输入数据，设置农历节日
 */
export const setLunarFestival = (param: Festival = {}) => {
  lFestival = param
}

/**
 * 返回农历y年一整年的总天数
 * @param y lunar Year
 * @return Number
 * @eg:var count = calendar.lYearDays(1987) ;//count=387
 */
export const lYearDays = (y: number) => {
  let i,
    sum = 348
  for (i = 0x8000; i > 0x8; i >>= 1) {
    sum += lunarInfo[y - 1900] & i ? 1 : 0
  }
  return sum + leapDays(y)
}

/**
 * 返回农历y年闰月是哪个月；若y年没有闰月 则返回0
 * @param y lunar Year
 * @return Number (0-12)
 * @eg:var leapMonth = calendar.leapMonth(1987) ;//leapMonth=6
 */
export const leapMonth = (y: number) => {
  //闰字编码 \u95f0
  return lunarInfo[y - 1900] & 0xf
}

/**
 * 返回农历y年闰月的天数 若该年没有闰月则返回0
 * @param y lunar Year
 * @return Number (0、29、30)
 * @eg:var leapMonthDay = calendar.leapDays(1987) ;//leapMonthDay=29
 */
export const leapDays = (y: number) => {
  if (leapMonth(y)) {
    return lunarInfo[y - 1900] & 0x10000 ? 30 : 29
  }
  return 0
}

/**
 * 返回农历y年m月（非闰月）的总天数，计算m为闰月时的天数请使用leapDays方法
 * @param y lunar Year
 * @param m lunar Month
 * @return Number (-1、29、30)
 * @eg:var MonthDay = calendar.monthDays(1987,9) ;//MonthDay=29
 */
export const monthDays = (y: number, m: number) => {
  if (m > 12 || m < 1) {
    return -1
  } //月份参数从1至12，参数错误返回-1
  return lunarInfo[y - 1900] & (0x10000 >> m) ? 30 : 29
}

/**
 * 返回公历(!)y年m月的天数
 * @param y solar Year
 * @param m solar Month
 * @return Number (-1、28、29、30、31)
 * @eg:var solarMonthDay = calendar.leapDays(1987) ;//solarMonthDay=30
 */
export const solarDays = (y: number, m: number) => {
  if (m > 12 || m < 1) {
    return -1
  } //若参数错误 返回-1
  const ms = m - 1
  if (ms === 1) {
    //2月份的闰平规律测算后确认返回28或29
    return (y % 4 === 0 && y % 100 !== 0) || y % 400 === 0 ? 29 : 28
  } else {
    return solarMonth[ms]
  }
}

/**
 * 农历年份转换为干支纪年
 * @param  lYear 农历年的年份数
 * @return Cn string
 */
export const toGanZhiYear = (lYear: number) => {
  let ganKey = (lYear - 3) % 10
  let zhiKey = (lYear - 3) % 12
  if (ganKey === 0) ganKey = 10 //如果余数为0则为最后一个天干
  if (zhiKey === 0) zhiKey = 12 //如果余数为0则为最后一个地支
  return Gan[ganKey - 1] + Zhi[zhiKey - 1]
}

/**
 * 公历月、日判断所属星座
 * @param  cMonth [description]
 * @param  cDay [description]
 * @return Cn string
 */
export const toAstro = (cMonth: number, cDay: number) => {
  const s =
    '\u9B54\u7FAF\u6C34\u74F6\u53CC\u9C7C\u767D\u7F8A\u91D1\u725B\u53CC\u5B50\u5DE8\u87F9\u72EE\u5B50\u5904\u5973\u5929\u79E4\u5929\u874E\u5C04\u624B\u9B54\u7FAF'
  const arr = [20, 19, 21, 21, 21, 22, 23, 23, 23, 23, 22, 22]
  return `${s.slice(cMonth * 2 - (cDay < arr[cMonth - 1] ? 2 : 0), 2)}\u5EA7` //座
}

/**
 * 传入offset偏移量返回干支
 * @param offset 相对甲子的偏移量
 * @return Cn string
 */
export const toGanZhi = (offset: number) => {
  return Gan[offset % 10] + Zhi[offset % 12]
}

/**
 * 传入公历(!)y年获得该年第n个节气的公历日期
 * @param y y公历年(1900-2100)
 * @param n n二十四节气中的第几个节气(1~24)；从n=1(小寒)算起
 * @return day Number
 * @eg:var _24 = calendar.getTerm(1987,3) ;//_24=4;意即1987年2月4日立春
 */
export const getTerm = (y: number, n: number) => {
  if (y < 1900 || y > 2100 || n < 1 || n > 24) {
    return -1
  }
  const _table = sTermInfo[y - 1900]
  const _calcDay = []
  for (let index = 0; index < _table.length; index += 5) {
    const chunk = Number.parseInt(`0x${_table.slice(index, 5)}`).toString()
    _calcDay.push(chunk[0], chunk.slice(1, 2), chunk[3], chunk.slice(4, 2))
  }
  return Number.parseInt(_calcDay[n - 1])
}

/**
 * 传入农历数字月份返回汉语通俗表示法
 * @param m lunar month
 * @return Cn string
 * @eg:var cnMonth = calendar.toChinaMonth(12) ;//cnMonth='腊月'
 */
export const toChinaMonth = (m: number) => {
  // 月 => \u6708
  if (m > 12 || m < 1) {
    return -1
  } //若参数错误 返回-1
  let s = nStr3[m - 1]
  s += '\u6708' //加上月字
  return s
}

/**
 * 传入农历日期数字返回汉字表示法
 * @param d lunar day
 * @return Cn string
 * @eg:var cnDay = calendar.toChinaDay(21) ;//cnMonth='廿一'
 */
export const toChinaDay = (d: number) => {
  //日 => \u65e5
  let s
  switch (d) {
    case 10:
      s = '\u521D\u5341'
      break
    case 20:
      s = '\u4E8C\u5341'
      break
    case 30:
      s = '\u4E09\u5341'
      break
    default:
      s = nStr2[Math.floor(d / 10)]
      s += nStr1[d % 10]
  }
  return s
}

/**
 * 年份转生肖[!仅能大致转换] => 精确划分生肖分界线是“立春”
 * @param y year
 * @return Cn string
 * @eg:var animal = calendar.getAnimal(1987) ;//animal='兔'
 */
export const getAnimal = (y: number) => {
  return Animals[(y - 4) % 12]
}

/**
 * 传入阳历年月日获得详细的公历、农历object信息 <=>JSON
 * !important! 公历参数区间1900.1.31~2100.12.31
 * @param yPara  solar year
 * @param mPara  solar month
 * @param dPara  solar day
 * @return JSON object
 * @eg:console.log(calendar.solar2lunar(1987,11,01));
 */
export const solar2lunar = (
  yPara: string | number,
  mPara: string | number,
  dPara: string | number
): SolarData | -1 => {
  let y = typeof yPara === 'string' ? Number.parseInt(yPara) : yPara
  let m = typeof mPara === 'string' ? Number.parseInt(mPara) : mPara
  let d = typeof dPara === 'string' ? Number.parseInt(dPara) : dPara
  //年份限定、上限
  if (y < 1900 || y > 2100) {
    return -1 // undefined转换为数字变为NaN
  }
  //公历传参最下限
  if (y === 1900 && m === 1 && d < 31) {
    return -1
  }

  //未传参  获得当天
  let objDate
  if (!y) {
    objDate = new Date()
  } else {
    objDate = new Date(y, m - 1, d)
  }
  let i,
    leap = 0,
    temp = 0
  //修正ymd参数
  y = objDate.getFullYear()
  m = objDate.getMonth() + 1
  d = objDate.getDate()
  let offset =
    (Date.UTC(objDate.getFullYear(), objDate.getMonth(), objDate.getDate()) -
      Date.UTC(1900, 0, 31)) /
    86400000
  for (i = 1900; i < 2101 && offset > 0; i++) {
    temp = lYearDays(i)
    offset -= temp
  }
  if (offset < 0) {
    offset += temp
    i--
  }

  //是否今天
  let isTodayObj = new Date(),
    isToday = false
  if (
    isTodayObj.getFullYear() === y &&
    isTodayObj.getMonth() + 1 === m &&
    isTodayObj.getDate() === d
  ) {
    isToday = true
  }
  //星期几
  let nWeek = objDate.getDay(),
    cWeek = nStr1[nWeek]
  //数字表示周几顺应天朝周一开始的惯例
  if (nWeek === 0) {
    nWeek = 7
  }
  //农历年
  const year = i
  leap = leapMonth(i) //闰哪个月
  let isLeap = false

  //效验闰月
  for (i = 1; i < 13 && offset > 0; i++) {
    //闰月
    if (leap > 0 && i === leap + 1 && isLeap === false) {
      --i
      isLeap = true
      temp = leapDays(year) //计算农历闰月天数
    } else {
      temp = monthDays(year, i) //计算农历普通月天数
    }
    //解除闰月
    if (isLeap === true && i === leap + 1) {
      isLeap = false
    }
    offset -= temp
  }
  // 闰月导致数组下标重叠取反
  if (offset === 0 && leap > 0 && i === leap + 1) {
    if (isLeap) {
      isLeap = false
    } else {
      isLeap = true
      --i
    }
  }
  if (offset < 0) {
    offset += temp
    --i
  }
  //农历月
  const month = i
  //农历日
  const day = offset + 1
  //天干地支处理
  const sm = m - 1
  const gzY = toGanZhiYear(year)

  // 当月的两个节气
  // bugfix-2017-7-24 11:03:38 use lunar Year Param `y` Not `year`
  const firstNode = getTerm(y, m * 2 - 1) //返回当月「节」为几日开始
  const secondNode = getTerm(y, m * 2) //返回当月「节」为几日开始

  // 依据12节气修正干支月
  let gzM = toGanZhi((y - 1900) * 12 + m + 11)
  if (d >= firstNode) {
    gzM = toGanZhi((y - 1900) * 12 + m + 12)
  }

  //传入的日期的节气与否
  let isTerm = false
  let Term = null
  if (firstNode === d) {
    isTerm = true
    Term = solarTerm[m * 2 - 2]
  }
  if (secondNode === d) {
    isTerm = true
    Term = solarTerm[m * 2 - 1]
  }
  //日柱 当月一日与 1900/1/1 相差天数
  const dayCyclical = Date.UTC(y, sm, 1, 0, 0, 0, 0) / 86400000 + 25567 + 10
  const gzD = toGanZhi(dayCyclical + d - 1)
  //该日期所属的星座
  const astro = toAstro(m, d)

  const solarDate = `${y}-${m}-${d}`
  const lunarDate = `${year}-${month}-${day}`

  const festivalDate = `${m}-${d}`
  let lunarFestivalDate = `${month}-${day}`

  // bugfix https://github.com/jjonline/calendar.js/issues/29
  // 农历节日修正：农历12月小月则29号除夕，大月则30号除夕
  // 此处取巧修正：当前为农历12月29号时增加一次判断并且把lunarFestivalDate设置为12-30以正确取得除夕
  // 天朝农历节日遇闰月过前不过后的原则，此处取农历12月天数不考虑闰月
  // 农历润12月在本工具支持的200年区间内仅1574年出现
  if (month === 12 && day === 29 && monthDays(year, month) === 29) {
    lunarFestivalDate = '12-30'
  }
  return {
    date: solarDate,
    lunarDate,
    festival: festival[festivalDate] ? festival[festivalDate].title : null,
    lunarFestival: lFestival[lunarFestivalDate]
      ? lFestival[lunarFestivalDate].title
      : null,
    lYear: year,
    lMonth: month,
    lDay: day,
    Animal: getAnimal(year),
    IMonthCn: (isLeap ? '\u95F0' : '') + toChinaMonth(month),
    IDayCn: toChinaDay(day),
    cYear: y,
    cMonth: m,
    cDay: d,
    gzYear: gzY,
    gzMonth: gzM,
    gzDay: gzD,
    isToday,
    isLeap,
    nWeek,
    ncWeek: `\u661F\u671F${cWeek}`,
    isTerm,
    Term,
    astro,
  }
}

/**
 * 传入农历年月日以及传入的月份是否闰月获得详细的公历、农历object信息 <=>JSON
 * !important! 参数区间1900.1.31~2100.12.1
 * @param y  lunar year
 * @param m  lunar month
 * @param d  lunar day
 * @param isLeapMonth  lunar month is leap or not.[如果是农历闰月第四个参数赋值true即可]
 * @return JSON object
 * @eg:console.log(calendar.lunar2solar(1987,9,10));
 */
export const lunar2solar = (
  y: string | number,
  m: string | number,
  d: string | number,
  isLeapMonth: boolean
): SolarData | -1 => {
  if (typeof y === 'string') y = Number.parseInt(y)
  if (typeof m === 'string') m = Number.parseInt(m)
  if (typeof d === 'string') d = Number.parseInt(d)
  isLeapMonth = !!isLeapMonth
  // const leapOffset = 0
  const leapMonthValue = leapMonth(y)
  // const leapDay = leapDays(y)
  if (isLeapMonth && leapMonthValue !== m) {
    return -1
  } //传参要求计算该闰月公历 但该年得出的闰月与传参的月份并不同
  if ((y === 2100 && m === 12 && d > 1) || (y === 1900 && m === 1 && d < 31)) {
    return -1
  } //超出了最大极限值
  const day = monthDays(y, m)
  let _day = day
  //bugFix 2016-9-25
  //if month is leap, _day use leapDays method
  if (isLeapMonth) {
    _day = leapDays(y)
  }
  if (y < 1900 || y > 2100 || d > _day) {
    return -1
  } //参数合法性效验

  //计算农历的时间差
  let offset = 0
  let i
  for (i = 1900; i < y; i++) {
    offset += lYearDays(i)
  }
  let leap = 0,
    isAdd = false
  for (i = 1; i < m; i++) {
    leap = leapMonth(y)
    if (!isAdd) {
      //处理闰月
      if (leap <= i && leap > 0) {
        offset += leapDays(y)
        isAdd = true
      }
    }
    offset += monthDays(y, i)
  }
  //转换闰月农历 需补充该年闰月的前一个月的时差
  if (isLeapMonth) {
    offset += day
  }
  //1900年农历正月一日的公历时间为1900年1月30日0时0分0秒(该时间也是本农历的最开始起始点)
  const strap = Date.UTC(1900, 1, 30, 0, 0, 0)
  const calObj = new Date((offset + d - 31) * 86400000 + strap)
  const cY = calObj.getUTCFullYear()
  const cM = calObj.getUTCMonth() + 1
  const cD = calObj.getUTCDate()

  return solar2lunar(cY, cM, cD)
}
